Improvement in regulating windmills



2 Sheets-Sheetl. D. TURNBULL.

REGULATING WIND-MILLS.- ,13z,393, Patented Sept. 19,1875.

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2 Sheets-Sheet 2. D..TURN,BU'LL.

, R'EGULATING WIND-MILLS. I N0.18Z,393. I Patented Sept. 19, 1876.

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it consists in combination L the ratchet. and thus hold the UNITEDSTATES PATENT OFFICE DAVID TURNBUDL, or WAVERLY, ILLINOIS.

IMPROVEMENT REGULAT'ING WINDMILLS.

Specification forming part of Letters Patent No. 182,393, datedSeptember 19, 1876 application filed March 6, 1876.

To all whom it may concern:

Be it known that I, DAVID TURNBULL, of Waverly, in the county of Morganand State of Illinois, have invented certain new and useful Improvementsin Regulating Windmills, pf which the following is a specification Thisinvention relates to certain improvements in apparatus forregulating'the operationof windmills, and is particularly designed forthat class of windmills employed for pumping water, its object being toprovide for automatically shifting the mill and pump-- the tank isexhausted or nearly exhausted, so as to automatically refill the tank;and

with the verticallysliding rod generally employed for throwing thewindmill out of gear with the pumping machinery, of a spring lever orpawl, adapted .to engage in a ratchet or notch on one side of the rod,and hold the same, said lever being operated by means of a weightedfloat suspended in the water-tank in such position that. when the tankis full the float will be elevated and will allow the pawl to engagemachinery out of gear until the water in the tank falls, allowing theweighted float, to release the pawl, and thus allow the machinery toautomatically fall into gear, in order to start the pumps to supply thedeficiency.

in the drawing, Figure 1 represents an elevation of a windmill with myimprovement applied. Fig. 2 represents an elevation of my improvedapparatus, showing the parts in position to throw the machinery in gear,and Fig. 3 a similar view, showing the position of the parts when themachinery is thrown out of gear.

The letter A represents a section of the shifting-rod common to mostwindmills, which is arranged to slide vertically in the supporting-frameB, secured in any convenient manner to the frame-work of the windmill. 0represents a stationary bar of metal secured to the frame B andprojectingabove the same at one side, andDa lever secured to the frame13, on the opposite side of the shifting-rod'A to that on which the bar0 is secured. Said lever also projects above the frame B, and betweenits end and that of the bar 0 is secured a spiral spring, which causesthe lower end of the lever D to set against the side of the shift- 1ngmachinery into gear when the water in beam, F, or other portion of theframe-work of the mill, in suitable position over the water-tank. Thevertical arm of said angle-lever is secured to the upper end of thespring pawl or lever D, and to the horizontal arm is secured a weightedfloat, G, which is suspended in such position in the tank that, as longas there is sufficient water in the tank, it will buoy said weight upand allow the spiral spring to set the lever D against the shiftingrodA, so as to engage in the notch or ratchet thereon when said notch isdepressedto throw the machinery out of gearing, and, when the waterfalls below a certain level, will allow the weight to overcome theresistance of the spring and release the shiftingrod, throwing themachinery into gear to start the pumps and refill the tank.

The operation of my apparatus is as follows: Theshifting-rod A beingconnected in the customary manner to the shifting parts of the machineryof the windmill, when the tank is properly filled, the shifting-rod isdepressed,,as usual, for throwing the machinery out of gear. The float,being buoyed up by the body of water in the tank, allows the spring tothrow the pawl into .the ratchet on the shifting-rod, and thus hold ituntil-the water is nearly or quite exhausted from the tank, when theweight is allowed to fall, releasing the lever from the ratchet, thusthrowing the machinery into gear and starting the pumps.

What 1 claim,"and desire to secure by Letters Patent, is

In combination with the ratcheted or notched shifting-rod, the springlever or pawl,

and weighted float connected therewith and suspended in the water-tank,the whole arranged to operate substantially as described. In testimonythat I claim the foregoing I have hereunto set myhand in the presence ofthe subscribing witnesses.

DAVID TURNBULL. Witnesses:

JAMES W. MANSON,

J. H. OHALLEN.

